Centering device for trucks



W. E. WOODARD.

CENTERING DEVICEFOR TRUCKS.

APPLICATION FILED APR. 23, 1920.

Patented Feb. 14,

IN VEN TOR.

94,. A TTORNEY S.

MINE-$29, jaw/7W W. E. WOODARD.

CENTERING DEVICE FOR TRUCKS.

APPLICATILON FILED APR.23,1920.

Patented Feb. 14, 1922.

3 SHEETS-SHEET 3- 'INVHVTOR.

WILLIAM E. wocnaen, or roassr HILLS, NEW 1031:.

CENTE RING DEVICE FDR TRUCKS.

moaser.

Specification of Letters Patent. Patented Feb 14,-

npplication filed April 23, 1920. Serial No. 375,967.

1 T all whom it may 0002 cam Be it known that I, Wnmmr E. lVooo ARI), acitizen of the United States, residing at Forest Hills, in the county ofQueens and State of New York, have invented certain new and usefulImprovements in Centering Devices for Trucks, of which the following isa specification. Y

My invention has reference to an inproved device of the characterspecified which is intended for use primarily on locomotive enginetrucks, but is'also applicable to service on trucks for tenders or otherrailroad-vehicles and the first of the objects of my present invention"is to provide a centering mechanism for trucks of whatare Commonlycalled the swing or lateral motion type and which will'ati'ord sucliresistance to lateral motion as may be desired while permitting as largea degree of freedom in action as may he required by the deflection ofthe truck in passing curves or otherwise. 1 A further object of mypresent invention is the provision of improved means for stabilizing orcentering the apparatus which permits the deflection; to provide for ani ncreased wear capaclty and at the same time permit of ready renewal ofworn parts and replacement thereof with new ones with a minimum oftrouble and expense.

In order that my invention may he better understood I will proceed todescribe the same in connection withthe accompanying "drawings, wherein:35

rigure 1 is an end elevation of a truck to which my invention isapplied; Figure 2 is a a plan View of such truck; Figure 3 is anenlarged figure showing in plan view the operative mechanism of mycentering means; Figure 4 is a sectional view taken on the line H ofFigure Figure 5 is an enlarged detail of one of: the pairs ofcenteringdevices; Figure G is an end elevation of the apparatus shown inFigure 5; 'and' Figure 7 is a detailed view showing a method which Iemploy for conveniently and economically constructing onset the detailedparts. p Referring now more particularly to Figures 1 and 2 it will beseen that I have therein shown a truck such as is used commonly inlocomotive practice in which there" is a main frame 1 which is made inone piece of cast metal such as cast steel and which has wheels 2, andan axle mounted in suitable at 8 are seated in grooves formed in the vbearing strips 9 which are secured b'ybolts- 10 on the upper side of thecross" member or bridge 11, which latter in the construction shown'isintegral with the side members 12 f of the unitarybody of the truck.

Along the center line of the center plate transversel'yof thelongitudinalexis of the truck, I provide on either-"side bf the platedepending lugs 13 which are connected "at" each side with cooperatinglugs 15 project-"7 M ing upwardly from the, center'part of the rockingmembers, the connection between lugs 13 'and'15 and pins 16;-

By the arrangement j i by eans of links l4-- I ust described":

pairs of rocking members are held in proper position with relation to"the other parts I while at the same time permitting theidoivn wardextension of the center pinivwhich P passes below the'plate 11 so thatit they be a provided with a. suitable pin or-other se curing device andas indicated 'inithe drawi ing it will not be interfered with by'theaction of thelinks 14- or lugs 15.-'

As shown in Figures 5 and 6 I"h'ave made the rocker members with amiddle part 17. having flanged ends 18to which, bysuitable rivets 19,there are secured the heart shaped members 20 which carry the load'andiare I preferably made of hardenmaterialjsuch as 9 some form ofspecial'steelj In Figure '7, Ihave shown a'preferred method for formingthe bearing strips 9 which are made of special durable steel of barformation, two of which I pIaceJto-"IOO, gether as shown inthis'figureandwwhile clamped in such position drill *atjthe point marked21 so'that when the two bars are separated the twostrips- 9 on oppositesides of the center piif will have theirrecesses exactly alined forproper support/of the rocker members. By providing thebearing strips 9between the plate 11 and the-rocker members and arran lng these stripsso the' 'tate ren wator' repairs where this is necessitated by wearof'the rocker members upon the strips and also reduce the amount of wearby employing'strips of harden-material than the material of the maintruck casting, but I am also enabled to do the necessary machining withvery much less difiiculty and expense than is required to machinetherequisite seats at the bottom of the pocket heretofore usuall used.

It will be seen thatin t 'e arran ement above described, I have providedhar metal bearing the said several'parts and made it. possible to makereplacement where necessary without loss or destruction-either of thebolster,

center pin casting or of any art of'the main the rockers themselves; '80 truck ram castmg or of t e'body art of It will be observed that whileI "have shown my invention as applied to a four wheel truck the same canbe .used in association with two wheel trucks or other types of iconstruction.

I claim: a

1. A double end centering device rocker for trucks havin 81 body,portion vof relatively soft metal with "attaching faces on its ends andcentering devices of relatively hard metal secured to the ends of 'saidbody v portion.

2. centering device for railway trucks having a center late and centerpin, rocker members on boli'sides of said center pin, supporting seatsfor said rocker. members and link connections between the center plateand each rocker member in vertical alinement on either side of thecentering pin.

3. A self centering truck for railway vehicles comprising a truck framehaving a. pocket for the centering parts provided with a bearing stripseat, a separate bearing strip seated in the pocket, a plurality ofcentering device'sea'ts 1n predetermined spaced relation formed in thebearing strip, centering rockersre'sting in said bearing strip seats inspaced relatlon, and means for securing said I strip to the pocket.

4. A self centering truck for railway veihicles' comprising a truckframe having a substantially central pocket depending below having acenter plate and a center for receiving the centering parts said pocketI i being provided with a bearing strip seat, a separate bearing stripseated-in the pocket,

centering rockers, a plurality of seats in predetermined spaced relationformed in the bearing strip and in which the rockers are journaled inspaced relation, and means for securing said stri to the pocket;

a 5. A self centering truck for railway vehicles comprising a truckframe havinga bearing-strip seat, a separate bearing strip seatedthereon and provid'ed with two pairs of spaced seats,- a" airof'rockerseach journaled in one of sai pairs of seats, and means forsecurin said strip.

6. A. set centering truck hicles comprising having a cket for railwa yean integral truck rame bearing stri seated in said pocket, a pluralityof centermg device seats in predetermined spaced relation formed inthebearing strip, centering rockers resting in said bearing strip seats ins ced relation, and 'nrieans 35 for securing sai strips to the pocket.

77. A centering device for railway trucks 1n arocker member on each sideof sai pin and 'a.link connection at each side of sai ,0

pin between the rocker member and the center plate, said linkconnections lying in the vertical transverse plane which cuts the centerof the pin.

8. A'centerlng device for railway trucks having a center plate and acenter pin, a rocker member on each side of said pin, suporting seatsfor each of said rocker mem- )ers at each side of the pin and placed atsubstantially equal distances from the pin longitudinally of the truck,and a link connection between the center plate and each rocker at eachside of the pin, the point of attachment on the rockermembers beingsubstantially midway between the sipport-ing seats.

9. A double end centering'dcvice rocker for trucks having a central bodyportion with centering members at each end and a lug connecting means onthe bodyportion 11o midway between the centering members.

10. self centering truck for railway ,'ve-

hicles comprising a truck frame having a 1 bearing strip seat, aseparate bearing strip seated thereon and of seats'in predeterminedspaced relation rocking members journaled in said seats in spacedrelation, and means for securing said strip.

In testimony signed my name.

' WILLIAM WOODARD.

or-the centering parts provided wit a bearing strip seat, a separate, 80

provided with aplurality- 116 whereof, I i have hereunto '120

